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Intermittent fasting and keto diet: Can you do both at the same time?
Hint: Both lead to the same metabolic state.
- The keto diet and intermittent fasting are two weight-loss methods that have gained popularity in recent years.
- Both can put the body in a state of ketosis, which leads to many of the same benefits.
- However, scientists are still researching both intermittent fasting and the keto diet, and it's best to consult a doctor before making any drastic changes to your dietary habits – especially two changes at same time.
The keto diet and intermittent fasting are two popular, effective ways to lose weight quickly. Both methods bring upon similar changes in the body: more ketones, lower blood sugar and, at least anecdotally, improved mood and mental clarity. Both also call for less snacks, though the keto diet restricts which snacks you eat while intermittent fasting restricts when you snack.
It's generally safe to experiment with either the keto diet or intermittent fasting (though it's always better to consult a doctor first). But how safe is it to combine the two? First, let's take a look at what both of these weight-loss approaches do to the body, and how those processes might interact.
The keto diet
In simple terms, ketosis is a metabolic process in which the body starts burning fat for fuel instead of sugar (glucose). Ketosis occurs naturally when the body doesn't have enough glucose to use as energy, so it instead turns to stored fats, which it converts into ketones that are distributed through blood to muscles and other tissue. The keto diet triggers this process by calling for a diet high in fat and low in carbohydrates, which results in lower levels of blood sugar and insulin.
Although scientists are still researching exactly how ketosis affects the body, some studies suggest keto diets can:
- Improve mood and mental clarity
- Improve heart health
- Decrease seizures among epilepsy patients
- Help in cancer treatments (potentially)
- Decrease acne
Cutting carbs is a sure way to put your body in a state of ketosis. Another way? Fasting.
Three square meals a day is the norm in the developed world, but in terms of human evolution it's a relatively new idea. The breakfast-lunch-dinner routine was likely established by Europeans, some of whom scoffed at the "uncivilized" Native Americans who didn't have rigid eating times and changed dietary habits with the seasons. But, as Yale University professor and author of Food: The History of Taste Paul Freedman argues, there's no biological reason for eating three meals a day at specific times.
Research shows that replacing rote eating habits with controlled fasting can be beneficial for your health, particularly through intermittent fasting, which can include fasting for several days at a time, fasting for 18 hours a day and eating only during the remaining six, and similar approaches.
Studies suggest intermittent fasting can:
- Increase longevity in animals and humans
- Increase levels of human growth hormone, promoting healthy muscle growth and fat loss
- Improve protection against cardiovascular diseases
- Gently stress your cells and neurons, strengthening them
- Promote autophagy — a natural process in which cells shed damaged cells, toxins
One particularly interesting benefit of intermittent fasting is that it seems to be effective at increasing insulin sensitivity, which refers to how cells respond to insulin – the hormone that tells cells to allow sugar to enter so it can be used as fuel.
"The food we eat is broken down by enzymes in our gut and eventually ends up as molecules in our bloodstream," Monique Tello, MD, MPH, wrote for Harvard Health Blog. "Carbohydrates, particularly sugars and refined grains (think white flours and rice), are quickly broken down into sugar, which our cells use for energy. If our cells don't use it all, we store it in our fat cells as, well, fat. But sugar can only enter our cells with insulin, a hormone made in the pancreas. Insulin brings sugar into the fat cells and keeps it there."
But for reasons scientists don't completely understand, our cells can become resistant to insulin, which can cause your pancreas to produce too much of the hormone and then, after it becomes fatigued, not enough. Intermittent fasting might break that cycle by putting your body in a fasting state in which it doesn't overproduce insulin, as Dr. Jason Fung told the Bulletproof Radio podcast:
"If you become very insulin resistant, then your insulin levels are up all the time, your body is always trying to shove the energy into the fat cells, and then you feel cold and tired and lousy. That's the real problem. Resistance really depends on two things. It's not simply the high levels, but it's the persistence of those levels. What people have realized is that the insulin resistance, because it depends on those two things, a period of time where you can get your insulin levels very low is going to break that resistance because it breaks that persistence. Not simply the levels, but the persistence of those levels."
Combining the keto diet with intermittent fasting
The major link between the keto diet and intermittent fasting is that they both can put the body into ketosis, generally resulting in lower levels of blood sugar and insulin, and therefore weight loss. But are they safe to do together?
Intermittent fasting will almost surely help you reach ketosis faster than a keto diet will alone, typically within 24 hours to three days. It's safe to say that, in terms of weight loss, combining these two approaches is likely to enhance the other's efficacy. But that's not to say everyone should do it.
Intermittent fasting and keto diets have been linked to mood problems in the weeks after beginning one or the other – irritability, anxiety, depressive symptoms. (For keto diets, this is often called the "keto flu.") It might be unsurprising that a drastic change in dietary habits would result in mood swings, and, to be sure, anecdotal reports suggest these symptoms tend to clear up eventually if people stick to their new routines. Still, it's best to consult your doctor before making such a drastic change – especially if you already suffer from a psychiatric condition, or a condition significantly affected by levels of blood sugar and insulin, like diabetes.
If you're going to move forward with combining intermittent fasting with the keto diet, consider these bits of advice from Perfect Keto:
"Make sure you still eat enough. Intermittent fasting does help you naturally eat less during the day, but be sure you're still eating nutritious ketogenic foods to avoid any deficiencies or metabolic issues. Use a website or app to calculate ideal caloric intake and your ketogenic macros for each day, then track them to make sure you're getting sufficient nutrition.
Measure your ketone levels. Even though fasting can really help you stay in ketosis, it's still important to make sure you aren't eating too many carbs or doing anything else to kick you out of ketosis. Track your ketones often to make sure you're actually in ketosis!"
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How would the ability to genetically customize children change society? Sci-fi author Eugene Clark explores the future on our horizon in Volume I of the "Genetic Pressure" series.
- A new sci-fi book series called "Genetic Pressure" explores the scientific and moral implications of a world with a burgeoning designer baby industry.
- It's currently illegal to implant genetically edited human embryos in most nations, but designer babies may someday become widespread.
- While gene-editing technology could help humans eliminate genetic diseases, some in the scientific community fear it may also usher in a new era of eugenics.
Tribalism and discrimination<p>One question the "Genetic Pressure" series explores: What would tribalism and discrimination look like in a world with designer babies? As designer babies grow up, they could be noticeably different from other people, potentially being smarter, more attractive and healthier. This could breed resentment between the groups—as it does in the series.</p><p>"[Designer babies] slowly find that 'everyone else,' and even their own parents, becomes less and less tolerable," author Eugene Clark told Big Think. "Meanwhile, everyone else slowly feels threatened by the designer babies."</p><p>For example, one character in the series who was born a designer baby faces discrimination and harassment from "normal people"—they call her "soulless" and say she was "made in a factory," a "consumer product." </p><p>Would such divisions emerge in the real world? The answer may depend on who's able to afford designer baby services. If it's only the ultra-wealthy, then it's easy to imagine how being a designer baby could be seen by society as a kind of hyper-privilege, which designer babies would have to reckon with. </p><p>Even if people from all socioeconomic backgrounds can someday afford designer babies, people born designer babies may struggle with tough existential questions: Can they ever take full credit for things they achieve, or were they born with an unfair advantage? To what extent should they spend their lives helping the less fortunate? </p>
Sexuality dilemmas<p>Sexuality presents another set of thorny questions. If a designer baby industry someday allows people to optimize humans for attractiveness, designer babies could grow up to find themselves surrounded by ultra-attractive people. That may not sound like a big problem.</p><p>But consider that, if designer babies someday become the standard way to have children, there'd necessarily be a years-long gap in which only some people are having designer babies. Meanwhile, the rest of society would be having children the old-fashioned way. So, in terms of attractiveness, society could see increasingly apparent disparities in physical appearances between the two groups. "Normal people" could begin to seem increasingly ugly.</p><p>But ultra-attractive people who were born designer babies could face problems, too. One could be the loss of body image. </p><p>When designer babies grow up in the "Genetic Pressure" series, men look like all the other men, and women look like all the other women. This homogeneity of physical appearance occurs because parents of designer babies start following trends, all choosing similar traits for their children: tall, athletic build, olive skin, etc. </p><p>Sure, facial traits remain relatively unique, but everyone's more or less equally attractive. And this causes strange changes to sexual preferences.</p><p>"In a society of sexual equals, they start looking for other differentiators," he said, noting that violet-colored eyes become a rare trait that genetically engineered humans find especially attractive in the series.</p><p>But what about sexual relationships between genetically engineered humans and "normal" people? In the "Genetic Pressure" series, many "normal" people want to have kids with (or at least have sex with) genetically engineered humans. But a minority of engineered humans oppose breeding with "normal" people, and this leads to an ideology that considers engineered humans to be racially supreme. </p>
Regulating designer babies<p>On a policy level, there are many open questions about how governments might legislate a world with designer babies. But it's not totally new territory, considering the West's dark history of eugenics experiments.</p><p>In the 20th century, the U.S. conducted multiple eugenics programs, including immigration restrictions based on genetic inferiority and forced sterilizations. In 1927, for example, the Supreme Court ruled that forcibly sterilizing the mentally handicapped didn't violate the Constitution. Supreme Court Justice Oliver Wendall Holmes wrote, "… three generations of imbeciles are enough." </p><p>After the Holocaust, eugenics programs became increasingly taboo and regulated in the U.S. (though some states continued forced sterilizations <a href="https://www.uvm.edu/~lkaelber/eugenics/" target="_blank">into the 1970s</a>). In recent years, some policymakers and scientists have expressed concerns about how gene-editing technologies could reanimate the eugenics nightmares of the 20th century. </p><p>Currently, the U.S. doesn't explicitly ban human germline genetic editing on the federal level, but a combination of laws effectively render it <a href="https://academic.oup.com/jlb/advance-article/doi/10.1093/jlb/lsaa006/5841599#204481018" target="_blank" rel="noopener noreferrer">illegal to implant a genetically modified embryo</a>. Part of the reason is that scientists still aren't sure of the unintended consequences of new gene-editing technologies. </p><p>But there are also concerns that these technologies could usher in a new era of eugenics. After all, the function of a designer baby industry, like the one in the "Genetic Pressure" series, wouldn't necessarily be limited to eliminating genetic diseases; it could also work to increase the occurrence of "desirable" traits. </p><p>If the industry did that, it'd effectively signal that the <em>opposites of those traits are undesirable. </em>As the International Bioethics Committee <a href="https://academic.oup.com/jlb/advance-article/doi/10.1093/jlb/lsaa006/5841599#204481018" target="_blank" rel="noopener noreferrer">wrote</a>, this would "jeopardize the inherent and therefore equal dignity of all human beings and renew eugenics, disguised as the fulfillment of the wish for a better, improved life."</p><p><em>"Genetic Pressure Volume I: Baby Steps"</em><em> by Eugene Clark is <a href="http://bigth.ink/38VhJn3" target="_blank">available now.</a></em></p>
The father of all giant sea bugs was recently discovered off the coast of Java.
- A new species of isopod with a resemblance to a certain Sith lord was just discovered.
- It is the first known giant isopod from the Indian Ocean.
- The finding extends the list of giant isopods even further.
The ocean depths are home to many creatures that some consider to be unnatural.<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU2NzY4My9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTYxNTUwMzg0NX0.BTK3zVeXxoduyvXfsvp4QH40_9POsrgca_W5CQpjVtw/img.png?width=980" id="b6fb0" class="rm-shortcode" data-rm-shortcode-id="2739ec50d9f9a3bd0058f937b6d447ac" data-rm-shortcode-name="rebelmouse-image" data-width="1512" data-height="2224" />
What benefit does this find have for science? And is it as evil as it looks?<div class="rm-shortcode" data-media_id="7XqcvwWp" data-player_id="FvQKszTI" data-rm-shortcode-id="8506fcd195866131efb93525ae42dec4"> <div id="botr_7XqcvwWp_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/7XqcvwWp-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/7XqcvwWp-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/7XqcvwWp-FvQKszTI.js"></script> </div> <p>The discovery of a new species is always a cause for celebration in zoology. That this is the discovery of an animal that inhabits the deeps of the sea, one of the least explored areas humans can get to, is the icing on the cake.</p><p>Helen Wong of the National University of Singapore, who co-authored the species' description, explained the importance of the discovery:</p><p>"The identification of this new species is an indication of just how little we know about the oceans. There is certainly more for us to explore in terms of biodiversity in the deep sea of our region." </p><p>The animal's visual similarity to Darth Vader is a result of its compound eyes and the curious shape of its <a href="https://lkcnhm.nus.edu.sg/research/sjades2018/" target="_blank" rel="noopener noreferrer dofollow" style="">head</a>. However, given the location of its discovery, the bottom of the remote seas, it may be associated with all manner of horrifically evil Elder Things and <a href="https://en.wikipedia.org/wiki/Cthulhu" target="_blank" rel="dofollow">Great Old Ones</a>. <em></em></p>
The newly discovered galaxies are 62x bigger than the Milky Way.
- Two recently discovered radio galaxies are among the largest objects in the cosmos.
- The discovery implies that radio galaxies are more common than previously thought.
- The discovery was made while creating a radio map of the sky with a small part of a new radio array.
An extremely active galaxy<p> <br> </p><p>Radio galaxies are galaxies with extremely active central regions, known as nuclei, which shine incredibly brightly in some part of the electromagnetic spectrum. They are known for emitting large jets of ionized matter into intergalactic space at speeds approaching that of light. They are related to quasars and blazars. It is thought that supermassive black holes are the energy source that make these galaxies shine so brightly. </p><p>What makes these two galaxies (known as MGTC J095959.63+024608.6 and MGTC J100016.84+015133.0) so interesting is their size. Only 831 similar, "giant radio galaxies" are known to exist. As study co-author Dr. Matthew Prescott explains, these are particularly large even for <a href="https://www.forbes.com/sites/jamiecartereurope/2021/01/18/we-just-found-two-mysterious-galaxies-62-times-bigger-than-our-milky-way-say-scientists/?sh=76edf29c2892" target="_blank" rel="noopener noreferrer">giants</a>:</p><p>"These two galaxies are special because they are amongst the largest giants known, and in the top 10 percent of all giant radio galaxies. They are more than two mega-parsecs across, which is around 6.5 million light-years or about 62 times the size of the Milky Way. Yet they are fainter than others of the same size."</p><p>The smaller of the two is just over two megaparsecs across, roughly six and a half million light-years. The larger is almost another half megaparsec larger than <a href="http://www.sci-news.com/astronomy/giant-radio-galaxies-09266.html" target="_blank">that</a>. <br></p><p>Exactly how these things get to be so massive remains a mystery. Some have proposed that they are ejecting matter into unusually empty space, allowing for the jet to expand further, though some evidence contradicts this. The most commonly suggested idea is that they are simply much, much older than the previously observed radio galaxies, allowing more time for expansion to occur.</p>
How does this change our understanding of the universe?<p> While exciting and impressive on their own, the findings also suggest that there are very many more of these giant galaxies than previously supposed. If you were going off the previous estimates for how typical these galaxies are, then the odds of finding these two would be 1 in 2.7×10<sup>6. </sup>This suggests that there must be more, given that the alternative is that the scientists were impossibly lucky. </p><p> In the study, the researchers also apply this reasoning to smaller versions of these galaxies, saying:</p><p> "While our analysis has considered only enormous (>2 Mpc) objects, if radio galaxies must grow to reach this size, then we may expect to similarly uncover in our data previously undetected GRGs with smaller sizes."</p><p> Exactly how common radio galaxies and turn out to be remains to be seen. Still, it will undoubtedly be an exciting time for radio astronomy as new telescopes are turned skywards to search for them.</p>
How did they find them?<iframe width="730" height="430" src="https://www.youtube.com/embed/c1ZW3nVfe5A" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe><p> The new galaxies were discovered by the amusingly named <a href="https://www.sarao.ac.za/gallery/meerkat/" target="_blank" rel="noopener noreferrer">MeerKAT</a> radio telescope in South Africa during the creation of a new radio map of the sky. The MeerKAT is the first of what will soon be the <a href="https://en.wikipedia.org/wiki/Square_Kilometre_Array" target="_blank" rel="noopener noreferrer">Square Kilometre Array</a> of telescopes, which will span several countries in the southern hemisphere and make even more impressive discoveries in radio astronomy possible. </p>
Daydreaming can be a pleasant pastime, but people who suffer from maladaptive daydreamers are trapped by their fantasies.
Maladaptive daydreaming<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNTUwMjgyMy9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTY0OTUxNzc3Nn0.yVIUGnZl6VnJhfevESkBpb1TEvwKrHcLtobwNJV55HI/img.jpg?width=1245&coordinates=0%2C63%2C0%2C63&height=700" id="713cf" class="rm-shortcode" data-rm-shortcode-id="e2d24a66284b3aa58ad16b66c135dc9d" data-rm-shortcode-name="rebelmouse-image" data-width="1245" data-height="700" />
One maladaptive dreamer spent hours a day dreaming he was a powerful man who could solve the world's problems.
(Photo: Pixabay)<p>Daydreaming is an indulgence of the mind and imagination, one provided courtesy of the <a href="https://www.sciencedirect.com/topics/neuroscience/default-mode-network#:~:text=The%20default%20mode%20network%20(DMN,and%20Exercise%20Psychology%20Research%2C%202016" target="_blank">default mode network</a>, a network of interacting brain regions that is active even when the conscious mind is not. But like so many of life's indulgences—wine, steak dinners, video games, and even <a href="https://www.healthline.com/health-news/why-too-much-exercise-can-be-bad-042514" target="_blank">exercise</a>—too much daydreaming can be harmful to our well-being. When daydreaming crosses that threshold, it can be considered maladaptive.</p><p>This disorder was first identified by <a href="https://haifa.academia.edu/EliSomer" target="_blank">Eli Somer</a>, a professor of clinical psychology at the University of Haifa, School of Social Work, in <a href="https://link.springer.com/article/10.1023/A:1020597026919" target="_blank" rel="noopener noreferrer">a 2002 paper</a>. That paper looked to six patients in a trauma center whose daydreaming habits replaced human interactions or interfered with their standard life functions, such as going to school or holding down a job. </p><p>Since then, other case studies have looked at <a href="https://www.healthline.com/health/mental-health/maladaptive-daydreaming#:~:text=Maladaptive%20daydreaming%20is%20a%20psychiatric,life%20events%20trigger%20day%20dreams." target="_blank" rel="noopener noreferrer">maladaptive daydreamers</a> and compiled a list of potential symptoms. These include vivid, richly-detailed daydreams; abnormally long daydreaming sessions; daydreams triggered by real-life events; daydreaming sessions that interrupt sleep; and repetitive motions or whisperings while daydreaming. On average, one study reported, maladaptive daydreamers spend <a href="https://bigthink.com/bps-research-digest/people-with-maladaptive-daydreaming-spend-an-average-of-four-hours-a-day-lost-in-their-imagination" target="_self">four hours a day</a> housed in their imaginations.</p><p>"This is not like rehearsing a conversation that you might have with a boss," <a href="https://www.cnn.com/2016/12/30/health/maladaptive-daydreaming-feature/index.html" target="_blank" rel="noopener noreferrer">Somer told CNN</a>. "This is fanciful, weaving of stories. It produces an intense sense of presence."</p><p>While such symptoms are common, though not comprehensive or guaranteed, how maladaptive daydreams manifest are naturally individual to the dreamers. <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6426361/" target="_blank" rel="noopener noreferrer">In one case study</a>, researchers analyzed the diary of a man codenamed "Peter." Peter described investing as many as 14 hours a day online. The news and images he happened upon would trigger related fantasies. For example, he may envision himself as a multimillionaire genius who could prevent bad news from occurring or self-insert himself into the power fantasies of superhero movies or police procedurals for hours at a time.</p><p>"When I felt this pain as a child, I started imagining how things could be different. I created stories which never happened. To suppress that pain I would hug my pillow or quilt, thinking I was being comforted by someone else," Peter wrote.</p><p>In an interview with CNN, Cordellia Rose described her maladaptive daydreaming like a drug and noted that her daydreams developed into intricate storylines that could last for years. These stories proved so distracted that she was unable to complete everyday tasks such as driving lessons.</p><p>"You get hooked on it, because it can be like an action movie in your head that's so gripping that you cannot turn off," Rose told CNN. "This [condition] needs to be public, because these are people suffering, and badly."</p><p>To be clear, maladaptive dreaming is not a <a href="https://www.webmd.com/schizophrenia/guide/what-is-psychosis#1" target="_blank" rel="noopener noreferrer">psychotic disorder</a> like schizophrenia. Daydreamers such as Peter and Rose are aware that their fantasies are as unreal as they may be unrealistic. Because of this, many maladaptive dreamers understand the difficulties they face and the real-life losses they have endured for the sake of their fantasies. </p>